I have left over from my build a etb Instruments Disc/Gear Tooth Speed Sensor. Didnt end up using or fitting is so brand new. Cost ne 43 Quid plus postage from ETB:

http://www.etbinstruments.com/index.php?route=product/product&path=99_110&product_id=192

Looking for £25 delivered.




[Edited on 20/2/17 by Adam]